Loading and dumping mechanism for scrapers.



FFTDF.

DAVID F. I-IILDEBBAND AND JGHN E. JOHNSON, F ZILLAH, WA-SHINGTQN.

$pecification of Letters Patent.

Patented Feb. 20, 1917.

Application filed April 30, 1915. Serial Nb. 24,964.

To all whom it may concern:

Be it known that we, DAVID F. Hmon- BRAND and JOHN E. JOHNSON, citizens of the United States, residing at Zillah, in the county of Yakima, State of Washington, have invented certain new and useful lnr provements in Loading and Dumping Mechanism for Scrapers; and we do hereby-ole clare the following to be a full, clear, and exact description of the invention, such, as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in horse drawn scrapers of the type commonly employed in the construction of roads and for like purposes, and the invention is more particularly directed to the provision of means associated with the scraper, and the draft portions thereof whereby the angular position of the scraper with relation to the ground may be varied to vary the bite of the scraper in the ground, and to provide means whereby the scraper may be dumped or positioned to carry a load without exerting any scraping action.

It is primarily the object of the invention to provide such scraper actuating means which are associated with the draft portion of the scraper in such manner that work of adjusting the scraper is accomplished by an operating lever in connection with the draft means associated with the scraper, thus relieving the operator of the work of manually manipulating the scraper.

It is further an object to provide such means associated with a scraper in such man ner which does not detract in any manner from the general efficiency of the scraper, and which is so arranged as to comprise a relatively simple structure.

With the above and other objects and advantages in view, the invention resides more particularly in the novel combination, for mation and arrangement of parts as more fully hereinafter described and pointed out in the appended claims.

Reference is had to the accompanying drawings, wherein similar characters of reference designate corresponding parts throughout the several views, and in which:

Figure 1 is a top plan view of a conventional type of scraper with the improved loading and dumping mechanism associated therewith.

Fig. 2 is an. end view of, the structure shown.

Fig. 3 is a transverse section on the line 33 of Fig. 1.

Fig. 4: is a sectional view on the line l'.'lof Fig. 1. l I

Referring now .more particularly to the accompanying drawings, there is shown a scraper comprising the back wall 5 having its lower portion forwardly bent and connected with a bottom plate 6 which is detachably connected thereto, and to the side walls 7 of the scraper, this being a conventional structure: The forward edges of the side walls are inclined and to provide a bearing for the scraper when it is being drunped, a bar 8 is secured to the lower portion of each side Wall, and extended forwardly thereof, and curved to provide an arcuate bearing member 9, the end portion of the barbeing secured diagonally at 10 to the wall and the curved portion 9 of the bar being twisted to lie at right angles to the plane of the attaching portions.

The draft means for the scraper comprises a horizontal draft bar 12 having pivotally connected thereto at each end a pair of links 13, each of which is in turn pivotally connected to the laterally turned end 1 of a bar 15 pivoted on a bolt member 16 on the inner face of the adjacent side wall 7, a pair of disks 1'? being secured to the bar at its pivotal connection to the bolt to form a head portion for the said bar. This bolt 16 is socured to the side wall by splitting its end portion and bending said split sections laterally as at 18 and riveting or otherwise securing them to the wall.

The means for adjusting the draft bar to thus adjust the angular position of the scraper with relation to the ground corn prises in part. a shaft 19 rotatably supported above the back wall 5 by strap members 20 bent therearound and secured to the wall, pins 21 being passed through the shaft and engaging the strap members to prevent lateral sliding of the shaft. Secured on each end of the shaft adjacent a respective side wall is a collar 22 forming substantially a drum member, and a chain section 23 is secured at 24 on the periphery thereof, and

trained rearwardly around and secured to the top portion of the bar 15 adjacent its head. at 26 to the drum, and wound forwardly around the drum, and trained around a pul' ley 27 secured'on the rear portion of the inner face of the respective end wall, and this A similar chain section is secured chain section is terminally secured to the head portion 17 of the bar 15. For holding the shaft against rotation with respect to the scraper and to provide a means for turning the shaft, an operating lever 28 is provided having one end bifurcated at 29 and secured to the intermediate portion of the shaft. A ratchet plate 30 is provided having an opening 31 receiving the shaft, and provided with'an arcuate series of teeth -32,-thisportion of the plate being disposed betweenthe fur-cations of the lever. Thelower end of the plate is bifurcated to straddletherear wall of the scraper, and is secured in place by strap members 33 bolted to the rear wall and having lateral portions 34: bolted to the plate. The lever carries a suitable spring pawl 35 actuated by a handle grip 36 at the handle end of the lever.

The operation of the device is as follows:

The pawl 35 being retracted, the lever 28 is swung rearwardly and downwardly, thus rotating the shaft 19 and the drums 22 secured thereto; this causes the chains 25 to be wound on the drums and the chains 23 to be unwound therefrom; as a consequence the members 15'and the bottom 6 of the scraper are caused to approach each other. In other words, theinclination of the bottom of the scraperto the line of draft is lessened and when the scraper is drawn forward by means of the draft bar the scraper in Fig. 2. It is to be understood that as soon as the desired angularity between the members 15 and the bottom of the scraper is reached the pawl 35 is released and allowed to lock the lever and, therefore, the

shaft 19, the chains 23 and 25, and the members 15 and draft bar 12 in fixed relation to the scraper through the medium of the ratchet plate 30. To dump the scraper the pawl is held retracted, the lever being elevated to its highest position.

Thus it is seen thata comparatively simple. device has been provided which will efiiciently perform the functions set forth. The mechanism described adjusts the relation of the scraper and the draft beams with respect to the ground so that the scraper is automatically actuated upon being drawn.

lVhat is claimed is.

1. In a scraper, the combination with a scraper body and draft means pivotally con nected thereto, of a, rotatable shaft carried by the body, flexible members oppositely wound on the shaft and connected with the draft means, and a ratchet lever for rotating the said shaft to vary the relative angle of the scraper with respect to the ground.

2. A scraper comprising a body portion, draft means including attaching arms pivoted to the sides of the body, a rotatable shaft mounted on the body, drums carried by the shaft, pulleys mounted on the sides of the body, flexible members connected to said drum and wound in opposite directions thereon, certain of the flexible members be ing connected to the attaching arms forwardly of their pivots, while the other flexible members are trained around the said pulleys and connected to the attaching arms, and a ratchet lever for rotating the said shaft to raise or lower the scraper with respect to they round.

In testimony whereof, we aflix our signatures, in the presence of two witnesses.

DAVID F. HILDEBRAN I JOHN E. JOHNSON. Witnesses OSCAR LARSON, J. G. FRAKES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

